[meteorite-list] comments from Bernd

From: Michael L Blood <mlblood_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:29 2004
Message-ID: <BC63DE63.11A2D%mlblood_at_cox.net>

Hi all,
        Bernd sent me this commentary today and I asked his permission
to post it to the list:

Today E. Olson posted some-
thing about blueish hibonite crystals in Terry Boswell's CV3's and
so I sent a private mail to Eric informing him that blueish hibonite
(CaAl12O19) components are commonly found in CM2's but that
they are rare in the Allende CV3 chondrite. I also added that, in CM
chondrites like Murchison, Ti-bearing hibonite is blue, while it is tan
or orange in Allende. The color difference is due to the presence of
trivalent titanium (Ti3+) in blue hibonite whereas orange hibonite does
not contain Ti3+. So if Terry's CV3s really contain b l u e hibonites,
this would be a rare occurrence - Vigarano being the only exception.

PS: Bernd is considering returning to the list. He left in protest of
continual negative postings. If we want him back - especially for
good, we will have to abandon past practices of attacking one
another on the list.
        Best wishes, Michael

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Received on Thu 26 Feb 2004 08:33:24 PM PST